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laravel - Laravel 在 url 中传递多个参数并取特定参数

问题描述

在我需要为每个 url 传递 2 个参数来插入它们之前，因为它们是以交错的方式进行的，也就是说。首先我创建一个考试，然后该考试有问题。为此，我决定沿路线传递 id

Route::resource('/exams/{exam}/questions');

为此，我选择在我需要的方法中像这样传递它：

Route::get('/exams/{exam}/questions/{id}/edit', function ($examId, $questionId){})
    ->name('questions.edit');

现在，问题有答案并引用它，我创建了这样的资源路径：

Route::resource('/exams/{exam}/questions/{question}/answers', 'Backend\AnswerController');

问题是，当我尝试保存答案时，它会产生 2 个问题......

在此处输入图像描述

Illuminate\Routing\Exceptions\UrlGenerationException
Missing required parameters for [Route: answers.index] [URI: exams/{exam}/questions/{question}/answers].

添加我的控制器和路由

|        | GET|HEAD  | exams/{exam}/questions/{question}/answers                    | answers.index           | App\Http\Controllers\Backend\AnswerController@index                    | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | POST      | exams/{exam}/questions/{question}/answers                    | answers.store           | App\Http\Controllers\Backend\AnswerController@store                    | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | GET|HEAD  | exams/{exam}/questions/{question}/answers/create             | answers.create          | App\Http\Controllers\Backend\AnswerController@create                   | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | GET|HEAD  | exams/{exam}/questions/{question}/answers/{answer}           | answers.show            | App\Http\Controllers\Backend\AnswerController@show                     | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | PUT|PATCH | exams/{exam}/questions/{question}/answers/{answer}           | answers.update          | App\Http\Controllers\Backend\AnswerController@update                   | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | DELETE    | exams/{exam}/questions/{question}/answers/{answer}           | answers.destroy         | App\Http\Controllers\Backend\AnswerController@destroy                  | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | GET|HEAD  | exams/{exam}/questions/{question}/answers/{answer}/edit      | answers.edit            | App\Http\Controllers\Backend\AnswerController@edit                     | web        |
|        |           |                                                              |                         |                                                                        | auth       |
|        | GET|HEAD  | exams/{exam}/questions/{question}/answers/{id}/confirmDelete | answers.confirmDelete   | App\Http\Controllers\Backend\AnswerController@confirmDelete            | web        |

我的控制器

public function index($examId, $questionId){
    $exams = Exam::findOrFail($examId);
    $questions = Question::findOrFail($questionId);
    $answers = Answer::all();


    return view('answer.index', compact('exams', 'questions','answers'));
  }

  public function create($examId, $questionId){
      $exams = Exam::find($examId);
      $questions = Question::find($questionId);

    /*.
      $isCorrect = Answer::where('is_correct', 1)->get();
      $isWrong = Answer::where('is_correct', 0)->get();
    */
      return view('answer.create', compact('exams', 'questions'));
  }

  public function store(AnswerStoreRequest $request, $questionId, Exam $exams){
      $answers = new Answer();
      $answers->description = $request->get('description');
      $answers->iframe = $request->get('iframe');
      $answers->image = $request->get('image');
      $answers->is_correct = $request->get('is_correct');
      $answers->question_id = $questionId;

      $answers->save();

      return redirect()->route('answers.index', $exams->id ,$answers->question_id);
  }

我遇到的问题有什么想法或解决方案吗？

编辑 1

添加创建答案视图。

<form action="{{ route('answers.store', [$exams->id, $questions->id]) }}" method="POST">

改变web.php

Route::get('/exams/{exam}/questions/{question}/answers', ['as' => 'answers.index', 'uses' => 'Backend\AnswerController@index']);
Route::get('/exams/{exam}/questions/{question}/answers/create', ['as' => 'answers.create', 'uses' => 'Backend\AnswerController@create']);
Route::post('/exams/{exam}/questions/{question}/answers/', ['as' => 'answers.store', 'uses' => 'Backend\AnswerController@store']);

Route::get('exams/{exam}/questions/{question}/answers/{answer}/edit', ['as' => 'answers.edit', 'uses' => 'Backend\AnswerController@edit']);
Route::put('exams/{exam}/questions/{question}/answers/{answer}', ['as' => 'answers.update', 'uses' => 'Backend\AnswerController@update']);

Route::delete('exams/{exam}/questions/{question}/answers/{answer}', ['as' => 'answers.destroy' , 'uses' => 'Backend\AnswerController@destroy']);
Route::get('/exams/{exam}/questions/{question}/answers/{id}/confirmDelete',['as' => 'answers.confirmDelete', 'uses' => 'Backend\AnswerController@confirmDelete']);

我还添加了我显示问题的索引的 foreach。

@foreach($questions->answers as $answer)
  <tr>
      <td>{{ $answer->id }}</td>
      <td>{{ $answer->description }}</td>
      <td>
          <a href="{{ route('answers.edit', [$exams->id, $questions->id, $answer->id]) }}"
             class="btn btn-warning btn-sm"><i class="far fa-edit"></i>
          </a>
          <a href="{{ route('answers.confirmDelete', [$exams->id, $questions->id, $answer->id]) }}"
             class="btn btn-danger btn-sm"><i class="fas fa-trash-alt"></i>
          </a>
      </td>
  </tr>
  @endforeach

标签： laravel

解决方案

当您处理多个参数时，您传递的多个参数是错误的，您需要指定哪个值属于哪个参数。

所以改变

return redirect()->route('answers.index', $exams->id ,$answers->question_id);

到

return redirect()->route('answers.index', ['examId' => $exams->id ,'questionId' => $answers->question_id]);

请参阅laravel 文档以获得准确的解释

编辑：您似乎也没有传递第三个必需参数。我建议您像这样手动定义 GET、POST、PUT、PATCH、DELETE 方法。

// Example
Route::get('example', ['as' => 'example.index', 'uses' => 'MyController@index']); // show all items
Route::get('example/create', ['as' => 'example.create', 'uses' => 'MyController@create']); // show the add new items
Route::post('example', ['as' => 'example.store', 'uses' => 'MyController@store']); // store new items
Route::get('example/edit/{id}', ['as' => 'example.edit', 'uses' => 'MyController@edit']); // edit existing items
Route::patch('example/update/{id}', ['as' => 'example.update', 'uses' => 'MyController@update']); // update existing items
Route::delete('example/delete/{id}', ['as' => 'example.delete', 'uses' => 'MyController@destroy']); // delete existing items

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